RM map of NGC 4217 at C-band rotated by 40° (panel b), beam size of 13″, cut to a level of 3σ of the polarized intensity map. The two strips to produce the vertical profiles are shown on the map with the left one showing the helical-like structure in panel a) and the right one showing the bubble-like structure in panel c). The box size is 18″ × 8″.
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